Steam-boiler



(No Model.)

W.. F.; BCHER.

STEAM BOILER.

. No. 303,156. Paten-tea Aug. 5,1884.

WITNESSES':

DWBNTOR ATTORNEYS.

M4 PfTERa Humumegrapmr. wamiugtm. nc.

UNITED STATES PATENT OFFICE.

WILLTAM r. nAfrcHEE, or cnnnrrou, iowa.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 303,156, dated August5, 1884.

Application filed May 7, 1884. (No model.)

To all whom it may concern:

Be it known that I, XVILLIAM F. HATCHE'R, of Ohariton, in the county ofLucas and State ot' Iowa, have made certain new and Vuseful Improvementsin Steam-Boilers, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings andletters of reference marked thereon, in whieh- Figure l shows asectional view of my im proved stcam-boiler setin masonry, and Fig. 2 isasectioual detail of one of the pendent pipes.

Similar letters indicate like parts in the gures.

My invention relates to improvements in that class of steam-boilersdesigned to heat dwellings and public buildings; and it consists in thepeculiar construction and arrange- -nient of the parts, as hereinaftermore fully set forth, and pointed out in the claim.

In the accompanying drawings, H represents a steam-boiler of cylindricalform, provided with an inner concentric shell, c', eX- tending from thebottom of the cylinder to the crown-sheet G, and extending across theshell a. at its upper end, thus forming a continuous cylindricalwater-space, W, closed at its bottom and opening at its upper end intothe steam and water space between the crownsheet G and the top of thecylinder H. The

"boiler H at its lower end rests or is supported crown-sheet G, undopening through it and extending down to the bottom of the magazine A,is a shell, a, surrounding the magazine and forming a waterspace, XV',closed at its bottom, and opening at its top into the space. between thecrown-sheet Gr and the top of the cylinder. The lower end of thecoalniagazine A- is beveled outwardly, so that the heads of the rivetswhich secure the lower end of the magazine A to the shell a will not icome in contact with the coa-l passing down the magazine.

K represents a passage extending through` the cylinder H andopcning intothe niagazine A. The passage K has its top, bottom, and sides closed,and through this passage K the coal is fed to the magazine near itsupper end.

Into threaded holes in the crown-sheet G are screwed several dependingtubes, D, preferably made of wrought iron, with square plugs welded inthe bottom of each, and into each of the tubes D is inserted a smallerconcentric circulating tube, N, open at both ends. By the means of thesedouble tubes l) N a constant circulation of water-is produced, the waterentering at the top of tube N, passing down and out of the bottom of thesaine into the lower end of the tube D, and thence up the same into thespace between the crownsheet G and the top of the cylinder.

At the bottom of the water-space W', surrounding the magazine A, is across-pipe, C, connecting the water spaces YV YV. The function of theconnecting-pipe is to promote the circulation bet-Ween said water-spacesand removing sediment.

F represents the grate, the iire and products of combustion passing upbetween the tapering magazine A and the water-spaces W V, and around thetubes D; thence through the smolieues B B; thence down around theoutside of the boiler H, through the iiue between the outside masonryand the boiler, and thence around the boiler H to a chimney of thebuilding.

Having thus fully described my invention, what i claim as new, anddesire to secure by Letters Patent, is

The steam-boiler herein described, consisting of the combination of aninner shell, a', au outer shell, H, forming outer water-leg, W, thetapering coal-magazine A, forming inner water-leg, l' 7, the crownsheetG, pendent pipes D, arranged in the crownsheet between t-he water-legs,and having internal pipes, as described, and the cross-pipes c,connecting the water-legs through the firespace, as and for the purposedescribed.

WILLIAM F. HATGHER..

Witnesses D. M. Tnoiurson, J. A. BROWN.

IOO

